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SubjectRe: [PATCH 1/2] mm: hotplug: implement non-movable version of get_user_pages() called get_user_pages_non_movable()
On 02/20/2013 06:23 PM, Lin Feng wrote:
> Hi Simon,
>
> On 02/20/2013 05:58 PM, Simon Jeons wrote:
>>> The other is that this almost certainly broken for transhuge page
>>> handling. gup returns the head and tail pages and ordinarily this is ok
>> When need gup thp? in kvm case?
> gup just pins the wanted pages(for x86 is 4k size) of user address space in memory.
> We can't expect the pages have been allocated for user address space are thp or
> normal page. So we need to deal with them and I think it have nothing to do with kvm.

Ok, I'm curious about userspace process call which funtion(will call
gup) to pin pages except make_pages_present?

>
> thanks,
> linfeng



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